Modern mobile communication signals require power amplifiers able to maintain very high efficiency in a wide range of output power levels, which is a major issue for classical power amplifier architectures. Following the load-modulation approach, efficiency enhancement is achieved by dynamically changing the amplifier load impedance as a function of the input power. In this paper, a review of the widely-adopted Doherty power amplifier and of the other load-modulation efficiency enhancement techniques is presented. The main theoretical aspects behind each method are introduced, and the most relevant practical implementations available in recent literature are reported and discussed

High Efficiency Power Amplifiers for Modern Mobile Communications: The Load-Modulation Approach / Ramella, Chiara; Piacibello, Anna; Quaglia, Roberto; Camarchia, Vittorio; Pirola, Marco. - In: ELECTRONICS. - ISSN 2079-9292. - ELETTRONICO. - 6:4(2017), p. 96. [10.3390/electronics6040096]

High Efficiency Power Amplifiers for Modern Mobile Communications: The Load-Modulation Approach

Ramella, Chiara;Piacibello, Anna;Quaglia, Roberto;Camarchia, Vittorio;Pirola, Marco
2017

Abstract

Modern mobile communication signals require power amplifiers able to maintain very high efficiency in a wide range of output power levels, which is a major issue for classical power amplifier architectures. Following the load-modulation approach, efficiency enhancement is achieved by dynamically changing the amplifier load impedance as a function of the input power. In this paper, a review of the widely-adopted Doherty power amplifier and of the other load-modulation efficiency enhancement techniques is presented. The main theoretical aspects behind each method are introduced, and the most relevant practical implementations available in recent literature are reported and discussed
2017
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11583/2691794
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